Arista

Arista CAB-O-8S-400G-1M | 400G CR8 OSFP to 8x50G CR SFP56 DAC, passive twinax copper, 1m reach

Arista CAB-O-8S-400G-1M | 400G CR8 OSFP to 8x50G CR SFP56 DAC, passive twinax copper, 1m reach

SKU:CAB-O-8S-400G-1M

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Description

High-density breakout DAC for 400G aggregation to eight 50G server or switch ports. OSFP on the host side fans out to 8x SFP56 50GBASE-CR ports, delivering ultra-low latency and power with passive twinax copper. Ideal for top-of-rack to server connections and leaf-to-edge breakouts where short-reach, cost-effective links are required.

Features

- 400G to 8x50G breakout for high-density aggregation
- OSFP to SFP56 passive twinax for ultra-low latency
- Standards-based 50GBASE-CR lanes with RS-FEC support
- Cost-effective short-reach alternative to optical breakout
- Tool-less, plug-and-play deployment in ToR and leaf fabrics

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

Technical Specifications

- Aggregate speed: 400G (8x50G PAM4 lanes)
- Breakout: 1x OSFP to 8x SFP56
- Standards: 400GBASE-CR8, 50GBASE-CR
- Cable type: Passive twinax copper (DAC)
- Reach/length: 1 meter
- Connectors: OSFP (host) to 8x SFP56 (device)
- Latency: Near-zero (passive copper)
- FEC: RS-FEC required on 50G CR links (switch/host dependent)
- Compatibility: OSFP 400G switch ports with 8-lane breakout support; 50G SFP56 ports
- Typical use: ToR switch to 50G NICs or leaf breakout to edge devices
- Operating environment: Data center short-reach copper interconnects

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